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Ceramic shell casting techniques using silica, zirconia and other refractory materials are currently used by the metal parts industry for 'net casting', forming precision shell moulds for molten metal casting. The technique involves a successive wet dipping and dry powder coating or stucco to build up the mould shell layer.
Shell molding, also known as shell-mold casting, [1] is an expendable mold casting process that uses resin covered sand to form the mold. As compared to sand casting, this process has better dimensional accuracy, a higher productivity rate, and lower labour requirements. It is used for small to medium parts that require high precision. [2]
Ceramic mold casting, also known ambiguously as ceramic molding, [1] is a group of metal casting processes that use ceramics as the mold material. It is a combination of plaster mold casting and investment casting. [2] [3] There are two types of ceramic mold casting: the Shaw process and the Unicast process. [4]
In 1958, Howe Sound Company, a metals and mining business, acquired Austenal. In 1959, Howe acquired Michigan Steel Casting Co. (MISCO), which provided the monolithic shell process. This process uses a ceramic shell with thin, strong walls to increase control of the solidification process and produce a sounder casting.
Ceramic mold casting – Plaster mold. V-process casting – Vacuum with thermoformed plastic to form sand molds. No moisture, clay or resin required. Die casting – Metal mold. Billet (ingot) casting – Simple mold for producing ingots of metal, normally for use in other foundries. Loam molding – a built up mold used for casting large ...
Inlet-outlet cover of a valve for a nuclear power station produced using investment casting. Investment casting is an industrial process based on lost-wax casting, one of the oldest known metal-forming techniques. [1] The term "lost-wax casting" can also refer to modern investment casting processes.
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Lost-wax casting – also called investment casting, precision casting, or cire perdue (French: [siʁ pɛʁdy]; borrowed from French) [1] – is the process by which a duplicate sculpture (often a metal, such as silver, gold, brass, or bronze) is cast from an original sculpture. Intricate works can be achieved by this method.
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